Bump Microsoft.SemanticKernel.Core from 1.0.0-beta6 to 1.0.0-beta8

Bumps [Microsoft.SemanticKernel.Core](https://github.com/microsoft/semantic-kernel) from 1.0.0-beta6 to 1.0.0-beta8.
- [Release notes](https://github.com/microsoft/semantic-kernel/releases)
- [Commits](microsoft/semantic-kernel@dotnet-1.0.0-beta6...dotnet-1.0.0-beta8)

---
updated-dependencies:
- dependency-name: Microsoft.SemanticKernel.Core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Directory.Packages.props

@@ -9,7 +9,7 @@
     <PackageVersion Include="Microsoft.Extensions.Logging.Abstractions" Version="7.0.1" />
     <PackageVersion Include="Microsoft.KernelMemory.Core" Version="0.8.231113.1-preview" />
     <PackageVersion Include="Microsoft.SemanticKernel.Abstractions" Version="1.0.0-beta6" />
-    <PackageVersion Include="Microsoft.SemanticKernel.Core" Version="1.0.0-beta6" />
+    <PackageVersion Include="Microsoft.SemanticKernel.Core" Version="1.0.0-beta8" />
     <PackageVersion Include="Microsoft.Extensions.Caching.Abstractions" Version="7.0.0" />
     <PackageVersion Include="Microsoft.Extensions.Configuration.Abstractions" Version="7.0.0" />
     <PackageVersion Include="Microsoft.SemanticKernel.Plugins.Core" Version="1.0.0-beta6" />